Water

Water is an inorganic compound with the chemical formula H2O. It is a transparent, tasteless, odorless, and nearly colorless chemical substance. It is the main constituent of Earth's streams, lakes, and oceans.

Water is also the fluid of all known living organisms, in which it acts as a solvent.
Water, being a polar molecule, undergoes strong intermolecular hydrogen bonding which is a large contributor to its physical and chemical properties.
It is vital for all known forms of life, despite not providing food energy or being an organic micronutrient.

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Source: Wikipedia · Image: Wikimedia Commons · Public domain

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